A joint study by Finland’s Lappeenranta University of Technology and Energy Watch Group presented on the sidelines of the COP23 talks in Bonn demonstrates that a global transition to 100% renewable electricity could be achieved by 2050, and would be more cost effective than the current electricity system.

The study, ‘Global Energy System Based on 100% Renewable Energy – Power Sector’ was presented during the Global Renewable Energy Solutions Showcase event, a sideline to the United Nations Climate Change Conference COP23 currently underway in Bonn.

The study’s key overall finding is that a global shift to 100% renewable electricity is feasible with current technology, and would be more cost effective than the current system led by fossil fuels and nuclear generation.

The study found that in a projected scenario for energy demand in 2050, 100% could be met by current renewable technologies, at a global average LCOE of €52/MWh, compared with 2015’s average LCOE of €70.

In EWG’s 2050 scenario, solar PV covers 69% of electricity demand, wind 18%, hydro 8% and bioenergy 2%. The study predicts that wind will briefly overtake solar in the 2020s, before further price drops put solar back in the lead.

Storage is outlined as the key supporting technology for solar, with around 31% of total demand covered by storage technologies. 95% of this is projected to come from short term storage provided by batteries, with power to gas conversion providing seasonal storage.

“There is no reason to invest one more dollar in fossil or nuclear power production,” exclaims EWG President Hans Josef. “All plans for a further expansion of coal, nuclear, gas and oil have to be ceased. More investments need to be channeled in renewable energies and the necessary infrastructure for storage and grids. Everything else will lead to unnecessary costs and increasing global warming.”

The report is based on an original model developed by Lappeenranta University of Technology, which calculates the most cost-effective mix of technologies based on available resources in 145 regions for a full reference year. The full study is published here.

Only time will tell whether this study’s recommendation will translate into reality. As lead author Christian Breyer sums up: “Energy transition is no longer a question of technical feasibility or economic viability, but of political will.”

Mark Hutchins

Mark Hutchins joined pv magazine in September 2016 as production editor of the monthly global title. Mark also works online reporting on upstream technology and markets, as well as newly emerging solar regions.More articles from Mark Hutchins

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